using SharpCompress.Common;
//using Spire.Barcode;
using Spire.Pdf;
using Spire.Pdf.Barcode;
using Spire.Pdf.Graphics;
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using ThoughtWorks.QRCode.Codec;
using static System.Formats.Asn1.AsnWriter;

namespace Business.Core.Utilities
{
    /// <summary>
    /// 二维码生成工具
    /// </summary>
    public class QRcodeHelper
    {
        /// <summary>
        /// 生成二维码
        /// </summary>
        /// <param name="context">二维码内容</param>
        public Image GenerateQrCode(string context)
        {
            //使用ThoughtWorks.QRCode.Codec生成二维码
            QRCodeEncoder qRCode = new QRCodeEncoder();
            qRCode.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.BYTE;          //编码方式(注意：BYTE能支持中文，ALPHA_NUMERIC扫描出来的都是数字)
            qRCode.QRCodeScale = 2;                                            //大小(值越大生成的二维码图片像素越高)-值越大，二维码图片越大
            qRCode.QRCodeVersion = 0;                                          //版本(注意：设置为0主要是防止编码的字符串太长时发生错误)
            qRCode.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.M;      //错误效验、错误更正(有4个等级)
            qRCode.QRCodeBackgroundColor = Color.White;                        //背景色
            qRCode.QRCodeForegroundColor = Color.Black;                        //前景色
            System.Drawing.Bitmap bt = qRCode.Encode(context, Encoding.UTF8);

            //bt.Save("二维码文件保存路径");//如果需要保存二维码，则返回文件路径即可
            return bt;
        }

        /// <summary>
        /// 生成条形码
        /// </summary>
        /// <param name="context">条形码内容</param>
        public void GenerateBarcode(string context)
        {
            
        }

        /// <summary>
        /// Pdf文档添加二维码
        /// </summary>
        /// <param name="filePath">文件路径</param>
        /// <param name="context">二维码内容</param>
        /// <param name="x">x轴偏移量</param>
        /// <param name="y">y轴偏移量</param>
        public void PdfAddQrCode(string filePath, string context,int x,int y)
        {
            PdfDocument pdf = new PdfDocument();
            //读取文件
            pdf.LoadFromFile(filePath);
            PdfPageBase pb = pdf.Pages.Add();
            pdf.Pages.Remove(pb);

            //生成二维码
            Image image = GenerateQrCode(context);

            //循环每一页，绘制二维码图形到PDF
            PdfImage pdfImage = PdfImage.FromImage(image);
            for (int i = 0; i < pdf.Pages.Count; i++)
            {
                var page = pdf.Pages[i];
                //自定义位置
                page.Canvas.DrawImage(pdfImage, x, y);
            }
            //保存文档
            pdf.SaveToFile(filePath);
        }

        /// <summary>
        /// Pdf文档添加条形码
        /// </summary>
        /// <param name="filePath">文件路径</param>
        /// <param name="context">挑衅码内容</param>
        /// <param name="x">x轴偏移量</param>
        /// <param name="y">y轴偏移量</param>
        public void PdfAddBarcode(string filePath, string context, int x, int y)
        {
            PdfDocument pdf = new PdfDocument();
            //读取文件
            pdf.LoadFromFile(filePath);
            PdfPageBase pb = pdf.Pages.Add();
            pdf.Pages.Remove(pb);
            //生成条形码
            PdfCode39Barcode pdfCode = new PdfCode39Barcode(context);   //构造条形码内容
            pdfCode.BarcodeToTextGapHeight = 2f;
            pdfCode.TextDisplayLocation = TextLocation.Bottom;          //条形码文字位置
            pdfCode.BarHeight = 40;                                     //高度
            pdfCode.NarrowBarWidth = 0.5f;                              //宽度比例
            pdfCode.TextColor = Color.Black;                            //文字颜色

            //绘制条形码图形到PDF
            for (int i = 0; i < pdf.Pages.Count; i++)
            {
                var page = pdf.Pages[i];
                //自定义位置
                pdfCode.Draw(page, new Point(x, y));
            }
            //保存文档
            pdf.SaveToFile(filePath);
        }

    }
}